def crop(self, p, width, height):
"""Crop the image starting at upper left point `p' and width `w',
height `h'.
"""
new = gd.createImage(width, height, self.truecolor())
if not self.truecolor() and self.transparent() != -1:
r, g, b, a = xRGBA(self.get_color(self.transparent()))
trans = new.colorAllocate(r, g, b, a)
new.colorTransparent(trans)
new.rectangle(0, 0, width, height, trans, 1)
new.copy(self.m_image, 0, 0, p[0], p[1], width, height)
self.m_image = new
def resize(self, width, height, smooth=1):
"""Resize the image to `width' times `height' pixels.
If `smooth' is nonzero, the image is smoothly interpolated.
"""
new = gd.createImage(width, height, self.truecolor())
if not self.truecolor() and self.transparent() != -1:
r, g, b, a = xRGBA(self.get_color(self.transparent()))
trans = new.colorAllocate(r, g, b, a)
new.colorTransparent(trans)
new.rectangle(0, 0, width, height, trans, 1)
new.copy(self.m_image, 0, 0, 0, 0, width, height, self.width(),
self.height(), smooth)
self.m_image = new
def convert_truecolor(self, bgcolor=None):
"""Convert an indexed color image to a truecolor one.
If the indexed color image has a transparent background, it is kept
by default. But because there is poor support amongst web browsers
for truecolor images with transparency, the `bgcolor' parameter
allows you to override the background color.
"""
if self.truecolor():
return
new = gd.createImage(self.width(), self.height(), 1)
if bgcolor is None:
if self.transparent() != -1:
r, g, b, a = xRGBA(self.get_color(self.transparent()))
bgcolor = RGBA(r, g, b, gd.AlphaTransparent)
if bgcolor:
new.rectangle(0, 0, self.width(), self.height(), bgcolor, 1)
new.copy(self.m_image, 0, 0, 0, 0, self.width(), self.height())
self.m_image = new